Recovery of the sinus-atria part of the frog heart after freezing in liquid nitrogen.
D000818:Animals; D003451:Cryoprotective Agents / Q000494:pharmacology; D005615:Freezing; D006325:Heart Atria / Q000187:drug effects*; D006339:Heart Rate; D066298:In Vitro Techniques; D009584:Nitrogen / Q000494:pharmacology*; D011894:Rana pipiens; D012849:Sinoatrial Node / Q000502:physiology*; D014021:Tissue Preservation
D003451:Cryoprotective Agents; D009584:Nitrogen